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Finding the Fourth Proportional to 4,891, 6,751.20 and 3,028

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Solution

The fourth proportional to 4,891, 6,751.20 and 3,028 is: 4,179.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891 : 6,751.20 = 3,028 : x
  2. Step 2: Convert to fraction form
    4,891/6,751.20 = 3,028/x
  3. Step 3: Cross multiply
    4,891x = 6,751.20 × 3,028
  4. Step 4: Simplify right side
    4,891x = 20,442,633.60
  5. Step 5: Solve for x
    x = 20,442,633.60/4,891
  6. Step 6: Final answer
    x = 4,179.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.